NCERT Solution for Class 10 Science Chapter 5
Periodic Classification of Elements
NCERT Books for Session 2020-2021
CBSE Board and UP Board
Intext Questions
Page No-90
Questions No- 3 Part 2
Name two elements that have two electrons in their outermost shells.
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Magnesium (Mg) and calcium (Ca) have two electrons in their outermost shells.
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All second group elements of periodic table like Be, Ca, Ma, Sr, etc.
Be and Ca
Second group elements
It is Be, Ca, Mg and Sr
not Ma
According to NCERT Textbook, it is Mg (Magnesium) and Ca (Calcium).
Calcium and Magnesium